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Investigation of a high-temperature combination heat pump for lower-cost electrification in multifamily buildings

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  • Kim, Junyoung
  • James, Nelson
  • Maguire, Jeff

Abstract

The development of space and water heating combination heat pumps capable of generating water temperatures high enough for convective heat emitters will enable more cost-effective and equitable decarbonization solutions for electrifying multifamily buildings. In this paper, multifamily building models and a charge-sensitive mechanistic cycle model of a combination heat pump are developed, and the system performance is predicted based on the models. Unlike other state-of-the-art residential heat pumping equipment, the modeled combination heat pump using an economized, fluid-injected variable-speed compressor can achieve higher temperature lifts of 40° – 85°C, with lower installation costs and complexity. The model predicted heating coefficient of performance (COPh) is 2.1 at an ambient temperature of −15°C with a high-temperature lift of nearly 85°C, and a seasonal coefficient of performance in heating mode (SCOPh) ranges from 2 – 4 for different locations. The system shows 30% – 90% lower CO2eq emissions over a condensing gas boiler and 9% – 13% lower projected installation costs than two separate space and water heat pumping appliances.

Suggested Citation

  • Kim, Junyoung & James, Nelson & Maguire, Jeff, 2024. "Investigation of a high-temperature combination heat pump for lower-cost electrification in multifamily buildings," Applied Energy, Elsevier, vol. 376(PA).
    • Handle: RePEc:eee:appene:v:376:y:2024:i:pa:s0306261924016088
    DOI: 10.1016/j.apenergy.2024.124225
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    References listed on IDEAS

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    1. Juan Carlos Roca Reina & Johan Carlsson & Jonathan Volt & Agne Toleikyte, 2025. "Alternatives for Decarbonising High-Temperature Heating Facilities in Residential Buildings," Energies, MDPI, vol. 18(2), pages 1-19, January.

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